Data of stock is downloaded from https://data.oecd.org/migration/stocks-of-foreign-born-population-in-oecd-countries.htm#indicator-chart and https://data.worldbank.org/indicator/SM.POP.TOTL by Yujia Wang on Nov 28, 2020.
Data of percentage is downloaded from https://data.oecd.org/migration/foreign-born-population.htm on April 24, 2019 by Levi Boxell.
Data of population is downloaded from https://data.worldbank.org/indicator/SP.POP.TOTL by Yujia Wang on Nov 28, 2020.